skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Effects of magnetic field and pressure in magnetoelastic stress reconfigurable thin film resonators

Abstract

Free-standing CoFe thin-film doubly clamped stress reconfigurable resonators were investigated as a function of magnetic field and pressure. A large uniaxial anisotropy resulting from residual uniaxial tensile stress, as revealed from magnetic hysteresis loops, leads to an easy magnetization axis aligned along the length of the beams. The quality factor of the driven resonator beams under vacuum is increased by 30 times, leading to an enhanced signal-to-noise ratio and a predicted reduction in the intrinsic magnetic noise by a factor of 6, potentially reaching as low as ∼25 pT/√Hz at 1 Torr. Stress reconfigurable sensors operating under vacuum could thus further improve the limit of detection and advance development of magnetic field sensing technology.

Authors:
; ;  [1]; ;  [2]; ;  [3];  [4];  [5];  [5];  [6]
  1. Naval Research Laboratory, Washington, DC 20375 (United States)
  2. Department of Physics and Astronomy, Rowan University, Glassboro, New Jersey 08028 (United States)
  3. Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742 (United States)
  4. Normandie Univ. (France)
  5. (France)
  6. Naval Undersea Warfare Center, Newport, Rhode Island 02841 (United States)
Publication Date:
OSTI Identifier:
22486351
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 3; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANISOTROPY; BEAMS; DETECTION; HYSTERESIS; LENGTH; MAGNETIC FIELDS; MAGNETIZATION; QUALITY FACTOR; RESONATORS; SENSORS; SIGNAL-TO-NOISE RATIO; STRESSES; THIN FILMS

Citation Formats

Staruch, M., Bussmann, K., Finkel, P., Kassner, C., Lofland, S. E., Fackler, S., Takeuchi, I., Dolabdjian, C., UCBN, GREYC, F-14032 Caen, CNRS, UMR 6072, F-14032 Caen, and Lacomb, R.. Effects of magnetic field and pressure in magnetoelastic stress reconfigurable thin film resonators. United States: N. p., 2015. Web. doi:10.1063/1.4927309.
Staruch, M., Bussmann, K., Finkel, P., Kassner, C., Lofland, S. E., Fackler, S., Takeuchi, I., Dolabdjian, C., UCBN, GREYC, F-14032 Caen, CNRS, UMR 6072, F-14032 Caen, & Lacomb, R.. Effects of magnetic field and pressure in magnetoelastic stress reconfigurable thin film resonators. United States. doi:10.1063/1.4927309.
Staruch, M., Bussmann, K., Finkel, P., Kassner, C., Lofland, S. E., Fackler, S., Takeuchi, I., Dolabdjian, C., UCBN, GREYC, F-14032 Caen, CNRS, UMR 6072, F-14032 Caen, and Lacomb, R.. 2015. "Effects of magnetic field and pressure in magnetoelastic stress reconfigurable thin film resonators". United States. doi:10.1063/1.4927309.
@article{osti_22486351,
title = {Effects of magnetic field and pressure in magnetoelastic stress reconfigurable thin film resonators},
author = {Staruch, M. and Bussmann, K. and Finkel, P. and Kassner, C. and Lofland, S. E. and Fackler, S. and Takeuchi, I. and Dolabdjian, C. and UCBN, GREYC, F-14032 Caen and CNRS, UMR 6072, F-14032 Caen and Lacomb, R.},
abstractNote = {Free-standing CoFe thin-film doubly clamped stress reconfigurable resonators were investigated as a function of magnetic field and pressure. A large uniaxial anisotropy resulting from residual uniaxial tensile stress, as revealed from magnetic hysteresis loops, leads to an easy magnetization axis aligned along the length of the beams. The quality factor of the driven resonator beams under vacuum is increased by 30 times, leading to an enhanced signal-to-noise ratio and a predicted reduction in the intrinsic magnetic noise by a factor of 6, potentially reaching as low as ∼25 pT/√Hz at 1 Torr. Stress reconfigurable sensors operating under vacuum could thus further improve the limit of detection and advance development of magnetic field sensing technology.},
doi = {10.1063/1.4927309},
journal = {Applied Physics Letters},
number = 3,
volume = 107,
place = {United States},
year = 2015,
month = 7
}
  • We have measured the velocity of Rayleigh waves in a thin film of YBa[sub 2]Cu[sub 3]O[sub 7] at low temperatures in the presence of a magnetic field of 7 T. The angle between the [ital c] axis and the field direction was continuously varied by 180[degree] inside the cryostat at fixed temperatures. Below the superconducting transition temperature the data show a sharp peak for a direction of the applied field that is perpendicular to the [ital c] axis. We explain this phenomenon quantitatively as an effect of the anisotropy of the effective electronic mass.
  • Crystalline erbium thin films and Er/Y superlattices with varying Er-layer thicknesses have been grown by molecular-beam epitaxy. The magnetic and structural properties of these samples have been analyzed by x-ray-scattering, bulk-magnetization, and neutron-diffraction techniques. From a comparison of the data for the two systems, the importance of interfacial strain relative to artificial modulation in shaping the magnetic behavior has been determined. Though the basic nature of the erbium magnetic order is not qualitatively altered in either the thin films or superlattices, the conical ferromagnetic phase is suppressed in all of the samples considered. The enhanced critical fields exhibit a systematicmore » dependence on Er-layer thickness. These effects appear to follow directly from the epitaxial basal-plane strain which is measurable in films over 14 000 A thick. This strain, along with a clamping'' of the Er thermal expansion to the Y lattice, leads to a reduction of the magnitude of the magnetoelastic energy that drives the ferromagnetic transition. The dependence of the magnetoelastic energy on the epitaxial strain is described by a model which accounts for the elastic coupling of the erbium lattice to the yttrium.« less
  • The soft magnetic FeCoAlO thin films with different response at high frequency were prepared by using RF magnetron sputtering. Two different configurations of the sputtering targets were used: the Al{sub 2}O{sub 3} chips were placed on Fe{sub 70}Co{sub 30} disk either uniformly dispersed on the sputtering area (Target-A) or dispersed on the half side of the sputtering area (Target-B). It was found that, although, the films deposited from both of Target A and B possessed good soft magnetic properties and in-plane uniaxial magnetic anisotropy, they showed different behaviors at high frequency. The films deposited by using Target-A have mean permeabilitymore » of 500 and a cut-off frequency (f{sub r}) of around 780 MHz, while the films deposited by using Target-B have mean permeability of 200 and a f{sub r} of 3.4 GHz. The higher f{sub r} of the later corresponds to the higher uniaxial anisotropic field in the films deposited by using the Target-B, which due to an extra anisotropy induced by the stress resulted from gradient of the Al-O composition. By adjusting the configuration of Target-B, the permeability and f{sub r} can be tuned to satisfy the different requirements for certain industrial applications.« less